Builds high-performance UI features for AI observability platform, including prompt playgrounds, management systems, human review tools, and LLM analysis. Requires expert TypeScript, React, NextJS, SQL skills; startup experience preferred.
Salary not listed
On-siteFullstack Engineering
About the role
Responsibilities
Ensure customers have a frictionless experience for enabling AI observability in their systems.
Contribute to foundation UI architecture focusing on performance and efficient data loading patterns.
Build user-facing pieces of Braintrust, including:
First-class prompt playground experience supporting multiple models across thousands of user inputs.
System for prompt management, configuration, and versioned comparisons.
Fully multiplayer, scalable human review system.
LLM output analysis and comparison across arbitrarily large datasets.
Requirements
Expert-level understanding of:
TypeScript
React
HTML
CSS
SQL
NextJS
Preferred:
Previous experience founding or working at startups.
Has written prompts / tinkered with GPT models and apps.
Full Stack Software Engineer building privacy-first websites, landing pages, and scalable backend systems for a secure mobile carrier. Focus on resilient connectivity, signaling firewalls, threat detection, and privacy-conscious features using TypeScript/React and Go. Requires 4+ years experience and strong UX intuition.
180k – 235k/yr
Hybrid4+ YOEFullstack Engineering
Software Engineer
TheGuarantorsNew York, NY +7
Senior Software Engineer building scalable backend services and modernizing a monolithic platform to microservices for a fintech company's deal flow and underwriting systems. Requires 5+ years experience with Node.js/NestJS, TypeScript, Go, APIs, and distributed systems.
170k – 195k/yr
Remote5+ YOEFullstack Engineering
Product Engineer, Talent Experience
MercorSan Francisco, CA
Build and ship polished full-stack features with frontend emphasis across multiple product surfaces for Mercor's AI talent platform. Requires 2-5+ years experience, strong React/TypeScript skills, full-stack capability, and comfort with AI coding tools in a fast-paced onsite environment.
130k – 500k/yr
On-site5+ YOEFullstack Engineering
Fullstack Engineer, Assesment
MercorSan Francisco, CA
Build and own backend-heavy full-stack systems for Mercor's assessment platform, designing evaluation pipelines that combine human judgment with AI-powered scoring for vetting top AI talent. Requires 3+ years professional software engineering experience with strong backend fundamentals and comfort across the stack.
130k – 500k/yr
On-site3+ YOEFullstack Engineering
Software Engineer III
ZoomInfoBethesda, MD
Full-stack Software Engineer building customer-facing features and AI-powered tools for sales conversation analytics. Requires 3-6 years experience with either backend (Python/Node.js) or frontend (React/Angular) proficiency plus eagerness to work across the stack, databases, and search tech.